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Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
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Amplifiers can offer a diverse array of features. If you select more than one feature, then you will view amplifiers that have ALL features selected. These include speaker-level inputs that facilitate seamless integration with factory audio systems, Bluetooth connectivity suitable for ATV/UTV or Classic vehicle setups, built-in DSPs that provide enhanced control over your audio signal, and a host of other functionalities to explore.
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An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.
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Many brands group their products into series or lines of products to help customers know the level of quality (good, better, best for example). You can filter by series and the brand using our guided browsing.
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The lowest impedance the amplifier will handle when it is not bridged.
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The lowest impedance the amplifier will handle when it is bridged.
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If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
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Sonic Certified amplifiers have been tested by the experts at Sonic Electronix to meet or exceed the wattage ratings provided by the manufacturer. If this is marked as Yes, then you can trust the wattage ratings. If marked as No, then we have tested the amplifier and it did not meet the advertised wattage ratings. If marked as Not Tested, then the Sonic Electronix experts have not yet been able to test the amp.
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Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
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A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

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This feature will tell you if the amplifier has the capability to connect to a Bluetooth device.
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Stinger SVMB

Stinger SVMB Blue LED Voltage Display

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Stinger SVMB Blue LED Voltage Display

• LED Voltage Gauge
• Accurate Reading
• Easy to Read LED Display
• 3 Wire Installation
• Flush or Mountable

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Get it Wed, Apr. 3 to VA. Order $49+ to ship free.

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$23.99

In stock

• LED Voltage Gauge
• Accurate Reading
• Easy to Read LED Display
• 3 Wire Installation
• Flush or Mountable

Stinger SGJ78

8-1/4" Cross Flow Cooling Fan

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8-1/4" Cross Flow Cooling Fan

• 8-1/4"
• Cross Flow Cooling Fan
• Keeps Components Running Cool
• Easy Installation

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$31.99

In stock

• 8-1/4"
• Cross Flow Cooling Fan
• Keeps Components Running Cool
• Easy Installation

Stinger SE-P14

Navigation USA / Canada 2018 Micro SD card for UN1810 (Heigh10)

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Navigation USA / Canada 2018 Micro SD card for UN1810 (Heigh10)

• Navigation microSD card use for UN1880
• iGO primo next gen navigation software
• Navigation maps of the U.S. and Canada
• Over 1,000,000 points of interest
• Turn-by-turn directions with voice guidance

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FREE 3-day shipping to VA. Get it Tue, Apr. 2

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$179.00

In stock

• Navigation microSD card use for UN1880
• iGO primo next gen navigation software
• Navigation maps of the U.S. and Canada
• Over 1,000,000 points of interest
• Turn-by-turn directions with voice guidance

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Price: $179.00

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Stinger SSGA104

0 to 4 Ga Setscrew Gauge Adapter

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0 to 4 Ga Setscrew Gauge Adapter

•1/0 to 4 Ga Adaptor
• Brass Construction
• Nickel Plated

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•1/0 to 4 Ga Adaptor
• Brass Construction
• Nickel Plated

Stinger SPI300

300 Watt RMS 600 Watt Peak Dual Outlet Power Inverter

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300 Watt RMS 600 Watt Peak Dual Outlet Power Inverter

• 600W MAX
• 300W RMS
• 2 AC Outlets

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$43.99

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Only 2 Left!

• 600W MAX
• 300W RMS
• 2 AC Outlets

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Price: $43.99

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Stinger SE-1501

1.5 Meter (5ft.) 8-Pin Display Power Wire Harness

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1.5 Meter (5ft.) 8-Pin Display Power Wire Harness

• 8 Pin Display Power Harness
• For Elev8 (UN1880) and Heigh10 (UN1810)
• Designed to allow the replacement of the OEM Radio with an aftermarket receiver

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$27.99

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Only 1 Left!

• 8 Pin Display Power Harness
• For Elev8 (UN1880) and Heigh10 (UN1810)
• Designed to allow the replacement of the OEM Radio with an aftermarket receiver

Stinger SGP90300

High Power 300 Amp Circuit Breaker w/ Built-In Distribution

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High Power 300 Amp Circuit Breaker w/ Built-In Distribution

• 300 AMP Circuit Breaker
• Input Gauge Size: 0 to 4 AWG
• Maximum Output Gauge: 4 AWG

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In stock

• 300 AMP Circuit Breaker
• Input Gauge Size: 0 to 4 AWG
• Maximum Output Gauge: 4 AWG

Stinger SGP901501

150 AMP Circuit Breaker with Manual Reset

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150 AMP Circuit Breaker with Manual Reset

• Manual Reset Circuit Breaker
• Power Rating: 150 Amps
• Push Button Reset
• Water Resistant Housing
• Integrated Holes for Simple Mounting
• Compact and Lightweight Design

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$33.99

In stock

• Manual Reset Circuit Breaker
• Power Rating: 150 Amps
• Push Button Reset
• Water Resistant Housing
• Integrated Holes for Simple Mounting
• Compact and Lightweight Design

Stinger SS69PUG

6" x 9" Truck Speaker Enclosure Box

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6" x 9" Truck Speaker Enclosure Box

• 6" x 9" Dual Single Speaker Enclosure
•Real Medium Density Fiberboard Construction
• Charcoal Colored Carpeting
• Quick Connection Terminal Cups

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$39.99

In stock

• 6" x 9" Dual Single Speaker Enclosure
•Real Medium Density Fiberboard Construction
• Charcoal Colored Carpeting
• Quick Connection Terminal Cups

Stinger SGP90200

200 Amp Circuit Breaker

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200 Amp Circuit Breaker

• 200 Amp Circuit Breaker
• Dust and splash proof
• Accepts 1/0 or 4 gauge wire
• Easy reset/disconnect
• Can act as a master disconnect for circuits

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$39.99

• 200 Amp Circuit Breaker
• Dust and splash proof
• Accepts 1/0 or 4 gauge wire
• Easy reset/disconnect
• Can act as a master disconnect for circuits

Stinger SHD20

Stinger SHD20 HPM Series Power or Ground Distribution Block with Satin Chrome Finish

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Stinger SHD20 HPM Series Power or Ground Distribution Block with Satin Chrome Finish

HPM Series Power or Ground Distribution Block • One 1/0 Gauge or 4 Gauge Input • Two 4/8 Gauge Outputs • Protective Cover Included • Corrosion Resistant Satin Chrome Finish

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HPM Series Power or Ground Distribution Block • One 1/0 Gauge or 4 Gauge Input • Two 4/8 Gauge Outputs • Protective Cover Included • Corrosion Resistant Satin Chrome Finish

Stinger PG34 (Single)

1/0 AWG (1/0 Gauge) Firewall Bushing

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1/0 AWG (1/0 Gauge) Firewall Bushing

• 1/0 Gauge Firewall Bushing
• Water tight seal when power wires pass through metal
• Locks securely as bushing is tightened

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In stock

• 1/0 Gauge Firewall Bushing
• Water tight seal when power wires pass through metal
• Locks securely as bushing is tightened

Stinger SWT4B

4 AWG (4 Gauge) Cable Clamp

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4 AWG (4 Gauge) Cable Clamp

• 4 Gauge Cable Clamp
• Easy-To-Use Cable Management And Organizational Tool
• Helps Keep Wires Routed And Secure
• Completes that "Competition Look"

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In stock

• 4 Gauge Cable Clamp
• Easy-To-Use Cable Management And Organizational Tool
• Helps Keep Wires Routed And Secure
• Completes that "Competition Look"

Stinger SS69HBG

6" x 9" Hatchback Speaker Enclosure

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6" x 9" Hatchback Speaker Enclosure

• Hatchback Carpeted Speaker Enclosure
• Fits 6" x 9" Speakers
• Built-In Push Terminals

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$39.95

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• Hatchback Carpeted Speaker Enclosure
• Fits 6" x 9" Speakers
• Built-In Push Terminals

Stinger SGW991

9 Conductor Speedwire 100ft Roll

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9 Conductor Speedwire 100ft Roll

• 9 Conductor 18 Gauge Speaker Wire
• Nine Cables In One
• Flexible Jacketing • Ideal For 4-Channel Amplifiers
• Easy Installation

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In stock

• 9 Conductor 18 Gauge Speaker Wire
• Nine Cables In One
• Flexible Jacketing • Ideal For 4-Channel Amplifiers
• Easy Installation

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Price: $88.00

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Stinger SPP1700

1700 Amp SPP Series Dry Cell Battery w/ Protective Steel Case

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1700 Amp SPP Series Dry Cell Battery w/ Protective Steel Case

• 12V SPP Series Dry Cell Battery
• Sealed Absorbed Glass Mat (AGM) Design
• Cranking Amps: 1700
• Peak Discharge: 3300 Amps
• Amp Hours: 105

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$442.99

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Only 2 Left!

• 12V SPP Series Dry Cell Battery
• Sealed Absorbed Glass Mat (AGM) Design
• Cranking Amps: 1700
• Peak Discharge: 3300 Amps
• Amp Hours: 105

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Price: $442.99

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Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
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Essential add-ons
NVX XBG3PK

1/0 AWG Big 3 Upgrade Kit with 100% OFC Wire for Audio Sytems up to 350 Amps

$114.99

$99.99

Add to cart
Steve Meade Designs VM-1 (SMD-VM1)

Steve Meade Designs SMD 12V Analog Voltage Meter

$99.99

$79.99

Add to cart
Stinger SVMR

Red LED Voltage Display

$51.00

$22.99

Add to cart
Stinger SVMB

Stinger SVMB Blue LED Voltage Display

$51.00

$23.99

Add to cart

Stinger SVTK4681

Harley Davidson Amplifier Installation Kit 1998-Present

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Harley Davidson Amplifier Installation Kit 1998-Present

• Pre-cut, terminated and loomed power/ground & speaker wire harnesses
• Direct fit wiring and fusing with pre-terminated ends with Ferrule connectors
• 8GA OFC power and ground
• 16GA speaker wire

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FREE shipping to VA. Delivers Apr. 10 - Apr. 17

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$125.00

Available

Ships in 10-14 days

• Pre-cut, terminated and loomed power/ground & speaker wire harnesses
• Direct fit wiring and fusing with pre-terminated ends with Ferrule connectors
• 8GA OFC power and ground
• 16GA speaker wire

SVTK4681 small

Item added to your cart.

Price: $125.00

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Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7

Stinger SGP35

500 Amp Relay and Isolator

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500 Amp Relay and Isolator

• Prevents Primary Battery Discharge
• Maximum Current Transfer
• Ideal for 2nd Audio Battery Isolation from Vehicle Systems
• 500A Constant/ 900A Peak

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FREE 3-day shipping to VA. Get it Tue, Apr. 2

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$85.00

In stock

• Prevents Primary Battery Discharge
• Maximum Current Transfer
• Ideal for 2nd Audio Battery Isolation from Vehicle Systems
• 500A Constant/ 900A Peak

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Item added to your cart.

Price: $85.00

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7

Stinger SHD821

HPM Series MANL/MIDI Fused Power Distribution Block with Satin Chrome Finish

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HPM Series MANL/MIDI Fused Power Distribution Block with Satin Chrome Finish

• HPM Series Fused Power Distribution Block
• Two 1/0 Gauge or 4 Gauge Inputs
• Four 4/8 Gauge Outputs
• Multiple Input/Output Design
• Protective Cover Included
• Corrosion Resistant Satin Chrome Finish

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Get it Wed, Apr. 3 to VA. Order $49+ to ship free.

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$31.99

In stock

• HPM Series Fused Power Distribution Block
• Two 1/0 Gauge or 4 Gauge Inputs
• Four 4/8 Gauge Outputs
• Multiple Input/Output Design
• Protective Cover Included
• Corrosion Resistant Satin Chrome Finish

SHD821 small

Item added to your cart.

Price: $31.99

Essential add-ons
T-Spec V8-MANL40

V8 Series 40A Nickel Plated MANL Fuses

$4.00

$2.99

Add to cart
T-Spec V8-MANL60

V8 Series 60A Nickel Plated MANL Fuses

$7.48

$2.99

Add to cart
Belva BMANL80

MANL Fuse 80A, 4PCS/Pack

$8.99

$3.99

Add to cart
Belva BMANL100

MANL Fuse 100A, 4PCS/Pack

$8.99

$3.99

Add to cart
Belva BMANL125

MANL Fuse 125A, 4PCS/Pack

$8.99

$3.99

Add to cart

Stinger SSGA48

Stinger Select 4 to 8 Ga Set Screw Gauge Adapter

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Stinger Select 4 to 8 Ga Set Screw Gauge Adapter

• Brass Construction
• 4 GA to 8 GA
• Nickel Plated Finish
• Large Set Screws

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In stock

• Brass Construction
• 4 GA to 8 GA
• Nickel Plated Finish
• Large Set Screws

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